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• N1102.2.1

  Ceilings With Attics

  • Where R-38 is required, R-30 over the whole ceiling counts if it runs full height over the top plate at the eaves; likewise R-38 for R-49. Not for the U-factor or UA routes.

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• N1108

  Additional Efficiency Requirements

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• N1105

  Simulated Building Performance

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• N1101

  General

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• N1102.2

  Specific Insulation Requirements

  • Insulation also meets the specific rules of N1102.2.1 through N1102.2.13.

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• N1108.2.7

  Renewable Energy

  • Renewables credit: permanently installed on-site capacity of at least 1.0 W per sq ft of conditioned floor area, with REC documentation.

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• N1110

  Additions

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• N1110.2.5

  Additional Efficiency Credit Requirements for Additions

  • Additions earn at least 5 credits from Table N1108.2, unless they add under 25 percent of floor area, add no water heating or HVAC equipment, add no conditioned space, or comply by performance or ERI.

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Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.